diff options
| author | Andi Kleen <ak@suse.de> | 2006-01-27 04:03:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-02-01 05:00:13 +0300 |
| commit | 3103039cc2a8dc6ababc29afac5c3cadbfa69af9 (patch) | |
| tree | f89e6a1ca25281fbf78f6438c0463d06251ae3a3 /arch/i386/pci/mmconfig.c | |
| parent | 877be3f0304de16a77f11b2b47f1291b800d5479 (diff) | |
| download | linux-3103039cc2a8dc6ababc29afac5c3cadbfa69af9.tar.xz | |
[PATCH] PCI: handle bogus MCFG entries
Handle more bogus MCFG entries
Some Asus P4 boards seem to have broken MCFG tables with
only a single entry for busses 0-0. Special case these
and assume they mean all busses can be accessed.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/i386/pci/mmconfig.c')
| -rw-r--r-- | arch/i386/pci/mmconfig.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/i386/pci/mmconfig.c b/arch/i386/pci/mmconfig.c index 4bb4d4b0f73a..0ee8a983708c 100644 --- a/arch/i386/pci/mmconfig.c +++ b/arch/i386/pci/mmconfig.c @@ -36,8 +36,7 @@ static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn) while (1) { ++cfg_num; if (cfg_num >= pci_mmcfg_config_num) { - /* Not found - fallback to type 1 */ - return 0; + break; } cfg = &pci_mmcfg_config[cfg_num]; if (cfg->pci_segment_group_number != seg) @@ -46,6 +45,18 @@ static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn) (cfg->end_bus_number >= bus)) return cfg->base_address; } + + /* Handle more broken MCFG tables on Asus etc. + They only contain a single entry for bus 0-0. Assume + this applies to all busses. */ + cfg = &pci_mmcfg_config[0]; + if (pci_mmcfg_config_num == 1 && + cfg->pci_segment_group_number == 0 && + (cfg->start_bus_number | cfg->end_bus_number) == 0) + return cfg->base_address; + + /* Fall back to type 0 */ + return 0; } static inline void pci_exp_set_dev_base(unsigned int base, int bus, int devfn) |